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arXiv 1409.2647quant-phphysics.atom-ph
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椭圆偏振光波中的电子自旋动力学

Electron-spin dynamics in elliptically polarized light waves

Heiko Bauke, Sven Ahrens, Rainer Grobe

摘要:

研究了椭圆偏振光束的自旋角动量与自由电子自旋自由度的耦合。结果表明,这种耦合,这是类似的起源,众所周知的自旋轨道耦合,可以导致自旋进动。自旋旋进频率与激光场的强度及其自旋密度的乘积成正比。电子自旋动力学分析采用精确的数值方法,以及依赖于时间的微扰理论的基础上完全相对论狄拉克方程和非相对论泡利方程,修正了相对论修正,占光的自旋密度。

英文摘要:

We investigate the coupling of the spin angular momentum of light beams with elliptical polarization to the spin degree of freedom of free electrons. It is shown that this coupling, which is of similar origin as the well-known spin-orbit coupling, can lead to spin precession. The spin-precession frequency is proportional to the product of the laser-field's intensity and its spin density. The electron-spin dynamics is analyzed by employing exact numerical methods as well as time-dependent perturbation theory based on the fully relativistic Dirac equation and on the nonrelativistic Pauli equation that is amended by a relativistic correction that accounts for the light's spin density.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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